CD-PC1881V
– 52 –
1
VDD
—
Digital supply.
2-5
HD7-HD4
Input/Output
Host data bus.
HD7 = MSB, HDO = LSB.
Internally pulled down. Pull down resistance = approx. 42 kohms.
Can quit this pull down with the HD_PD_OFF register (74H, bo).
6
GND
—
Ground
7-10
HD3-HD0
Input/Output
Host data bus.
HD7 = MSB, HD0 = LSB
Internally pulled down. Pull down resistance is approx. 42 kohms.
Can quit this pull down with the HD_PD_OFF register (74H, bo).
11,12
GND
—
Ground
13
X1
Input
To connect a 27 MHz oscillator.
Open when not using.
14
X2
Input
To connect a 27 MHz oscillator or input 27 MHz clock.
Set the clock at CKSEL terminal.
Signal input at 3.3 Vp-p.
15
VDD
—
Digital supply.
16
CKSEL
Input
Select a clock to be input to X2 terminal.
Use CKSEL = High: oscillator.
CKSEL = Low : 27 MHz clock input.
17
VDD
—
Digital supply.
18
GND
—
Ground
19
HCS
Input
Chip select signal.
20
HRD
Input
Read strobe signal.
21
HWR
Input
Write strobe signal.
22
HA
Input
Address / address strobe signal.
23
HSELA
Input
Host interface select signal.
Select a serial interface or an 8-bit parallel interface.
HSELX = High: parallel interface.
HSELX = Low: serial interface.
24
HSELA
Input
Host interface mode select signal.
Select multiplex mode or separate mode.
HSELA = High: multiplex mode.
HSELA = Low: separate mode.
Fixed low when using serial interface.
25
VDD
—
Digital supply.
26
GND
—
Ground
27
RESET
Input
Reset terminal.
28
HDAK
Output
Host bus acknowledge signal.
29
INT
Output
Interrupt signal.
30
GND
—
Ground
31
AUCLK
Input
Audio clock (16.9344 MHz).
32
AUBCK
Output
Audio bit clock.
33
AULRCK
Output
Audio L/R clock.
34*
AUEMPH
Output
Audio emphasis signal.
35
AUDO
Output
Audio data output.
36
VDD
—
Digital supply.
37
GND
—
Ground
38-42
MA8-MA4
Output
DRAM address bus.
MA8 = MSB, MAO = LSB.
43
GND
—
Ground
44
VDD
—
Digital supply.
45-48
MA3-MA0
Output
DRAM address bus.
MA8 = MSB, MA0 = LSB.
49
MRAS
Output
DRAM low address strobe signal.
50
GND
—
Ground
51
VDD
—
Digital supply.
ICV2 VHiD61012GC-1: MPEG Decoder (D61012GC) (1/2)
Pin No.
Function
Terminal Name Input/Output
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
